Combined typewriting and computing machine



F. A. HART. COMBINED TYPEWRITING AND COMPUTING MACHINE.

APPLICATION FILED FEB- 5|1917. 1,356,525.

Patented Oct 26, 1920.

2 SHEEISSHEET I.

m U l VV/fnessesx Maw W/ I by F. A HART.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

APPLICATION FILED FEB. s, 1917.

1,356,525, Patented Oct. 26, 1920.

2 SHEElS SHEET 2.

3 14477765665 r Wye/770x- UNITED STATES PATENT OFFICE.

nanmucx a. mm, mm, inw mun, ABSIGIIOI T0 mnwoon ooxrumencma 92mm, or NEW roux, x. I, A comm'nox or mronx.

connnm TYPEWBI'I'ING AND COMPUTING momma Specification of Letters Patent. Patented Oct, 26, 1920,

Application fled mm 8, 1911. .m-m No. 140,500.

To all whom it may concern Be it known that I, FREDERICK A. HART, a citizen of the United States, residin in Newark, in the county of Essex and tate of New Je have invented certain new and useful Tm rovements in Combined Typewriting an Computing Machines, of which the following is a specification.

My invention relates to combined typewriting am computing machines and is herein disclosed as applied to such machines in what is known as the Underwood Addendagraph type. In said machines, as in several other kinds of combined typewriting and computing machines, the usual typewriter carriatge with its revolving platen is emp y 7 center of the machine, while the totalizer and many parts of the computin mechanism are at the front of the mac ine, and both form part of a carriage which travels on rails. there being one rail at the rear of the machine and frequently another rail or rails between the platen and the totalizer.

Since this construction brings the totalizer in front of and outside the rails on which the carriage travels, it is exceedingly im portant that the adjustment of the rail shall be accurate and that the lost motion between the rails and the bearings which slide on them be negligible. The need for this is especially apparent when it is realized that the totalizers in such machines include a series of computing wheels which have to be turned to a very accurate amount by a master wheel which engages them seriatim. This requires that there be little lost motion between the teeth of the master wheel and the computing wheels if the machine is to operate accurately. This elimination of lost motion emphasizes the necessity for accurate adjustment of the carriage rails and the bearings which slide on them; and in fact the carriage should fit the rails so accurately that the totalizer seems ri idly mounted exce t for the fact that it sli es.

t is also desirable to have the totalizers adjustable on said carriage and to provide a scale whereby the totalizer may be readily irregularit the platen being to the rear of the inafter appear.-

the front rail of the carriage double, in the form of two facing V rails, and, since it is impossible to out two faces erfectly true with reference to each other in such a rail, I make the rail in two so arate parts which individually are positive y adjustable relatively to each other at several oints 1110' their length, thus enabling t e slightest tageous to provide that the whole front of the carriage including said bearings and the support for the totalizer, may be adjustable atively to the rest of the carriage, so as to permlt the totalizer scale to be set accurately relatively to the escapement mechanism and the rest of the carriage adjustments.

Other features and advantages will here- In the accompan ing drawings,-

Figure 1 is a si e view of so much of an Underwood Addendagraph as seems advantageous for illustratin my invention as applied thereto, part 0% the totalizer being shown in section.

Fig.v 2 is aplan view partly sectional showing the devices for adjusting the front of the carriage. I

Fig. 3 is a sectional side view showing the ad'ustable mountings of the rails.

ig. 4 is a plan view of mostv of the carria e, the totalizer, etc.

ig. 5 is a front view of most of the parts seen in Fi 3. t

In the Tnderwood Addendagraph, alphabet and numeral keys 1 print against the front side of the platen 2, which is revolubly mounted in the carriage 3, said carria e being drawn along a step at atime at t e ac pair of rollers 6, which have their axes at right angles to each other,

to be taken up. I have also 95 found 1t a vantageous to make the bearings,

- ing two sets of rollers, each set including a 11 There are two rails 7 and 8, on which the front of the carriage runs, and against which said rollers bear, each rail comprising a slanting face 9, which faces forwardly, and a" slanting face 10, which faces rearwardly', the two faces being at right angles to each other, so that one roller 6 of ever pair, bears either against a face 9 or a ace 10.

while the carriage itself includes a bar 11" writer carriage 3 and extend forwardly over the rails 7 and 8. The bar 11 is a rearwardly projecting part of a front plate 15, said plate being pendent from the front ends of the brackets 1 1 and adjustable along the face of the brackets. To effect this adjustment, the plate 15 is provided with elongated slots 16, through which pass screws 17, which are threaded into the brackets 14, and of which the heads enter counter-bored holes in holding plates 18, of which one lies in each recess 19 in the end of the front of the front plate 15.

The plate 15 is provided on its upper surface with a scale 20 for the purpose of enabling the typist to accurately and quickly place thereon a totalizer 21, whlch may be adjustably fastened by means of a handle 22 at any point along the rack 23, which has teeth at letter space intervals. The exact holding means for the totalizer is im-' material to the present invention, but, advantageouslv, the totalizer engages identical rack bars 23 and 24: at the bottom and top of the plate 15. The typewriter carriage 3 is provided with the usual pointer 25 which indicates on the usual fixed scale 26, the point at which the typewriter carriage stands. Qwing to the fact that the scale 20 is a traveling scale, while the scale 26 is a fixed scale, the scales are numbered in opposite directions, with the result that the typist can at once position the totalizer 21 by merely noting the number on the scale 20 at the point on the scale 26 indicatedby the position of the pointer 25.

The totalizer 21 has its pointer 27 at one side thereof, namely, opposite the wheel of lowest denomination, since it is usually advantageous to position the totalizer and identify columns by the units figure thereon. Forconvenience, a pointer 28 is placed on the frame to indicate on the scale 29 formed as an extension at the front and bottom of the totalizer. This pointer indicates where the totalizer stands. The scale. 29 shows the comma. or pointing ofi places as blanks. Since the rails 7 and 8 are quite long and must have their faces adjusted with extreme accuracy for the reasons indicated above, it

is difficult to manufacture said rails with sufiicle'nt accuracy if made in one piece so that they can stand any considerable amount of wear, for resistance to wear necessitates an extremely hard surface which will either wear a cutting tool in cutting it, or else the rail will be warped in being hardened; It is, however, comparatively easy to manufacture a single V-shaped surface which shall be perfectly true. ll, therefore, provide means whereby the rails 7 and 8 may be adjusted both separately and relatively to each other, and have found it advantageous to provide for suchadjustments at a number. of points in the run of the typewriter carriage; four polnts, for example, in an ordinary ten inch machine is usually sufficient.

To obtain such adjustmentthe rails'7 and 8 are independently held to an upper frontplate 30 fast to the frame of the typewriter, said platehaving a flat face, and the rails 7 and 8 being held a ainst said face by flat head screws 31, whic are threaded into the plate 30, These screws may fit the rails 7 and 8 fairly closely, as such a term is used in ordinary machine practice; that is, they allow an almost microscopic shifting of the rails on them (see Fig. 5), when they are slightly loosened. For positively adjusting said rails relatively to each other, there is provided a pair of screws 32 which are threaded into the upper rail 7, and have heads which are adapted to draw the lower rail toward the upper rail. In order to keep the rails apart, there is also provided a spacing screw 33, which is threaded in the lower rail 8 and which bears against the horizontal flat surface 34, forming the bottom of the body 35 and the rail 7. It will be seen then that by tightening the screw33to the proper tension, the rails 7 and 8 may be properly spaced from each other, and then may be located on the carriage, and then tightened in place by tightening the screws 32, or vice versa. As shown in Fig. 5, there is a grou of screws 32, 33, near each end of the rails and 8, and also two groups of said screws spaced at equal intervals between the ends of the rail.

As will be seen from Figs. 4 and 5, the scale 20 is out directly on the upper surface of the front plate 15, and extends up over the bosses 36 at the end of said plate, these being the bosses which afford room for the cutting of the slot or recess 19.

The master wheel 37 turns in a fixed plane in line with the pointer 28 and is adapted to turn the computing wheel 38 with which it engages. The computing wheels for this urpose project below the totalizer 21, so-

t at they also cooperate withthe carry-over devices 39, while they mesh with the numeral wheels 40. It will be observed that by' accurately alining the typewriter carrlage on its rails, the computing wheels may be very accurately-adjusted relatively to the master wheel. I

It will thus be seen .that the adjustability of the rails 7 and 8 relatively to each other,

and to the frame on which they are mounted, enables a very accurate ad'ustment of the computing wheels to an from the master wheel. Furthermore, the arrangement of the groups of screws at intervals enables the track or groove formed b the rails 7 and 8 to be so accurately alined that the computing wheel shaft moves strict parallel to the master wheel shaft. This s an important feature, especially where the talizer support and forming raceways thereputing with, bearing devices in said raceways, means at the ends of said members for supporting said ends in fixed position, and means intermediate said ends, whereby intermediate portions of said members may be drawn together or forced apart to properly position portions of said members, to insure accurate guiding of said totalizer in passing through a computing zone.

2. In a combined typewriting and commachine, the combination with a traveling carriage including a front plate having upper and lower V-shaped grooves, substantially in the same vertical plane, of a totalizer mounted on said front plate, two members provided with V-shaped grooves facing the grooves of said front plate and forming raceways therewith, bearing devices in said raceways, a totalizer on said front plate, a master wheel positioned substantially vertically beneath said totalizer, means to adjust said members comprising means to move them towardand away from each other, and means to secure each of said members in adjusted position.

3. In a combined typewriting and computing, machine, the combination with a traveling carriage including a platen and a ment with said totalizer front rail comprising two ed members having bearing surfaces, and

rail on which said carriage travels near the rear thereof, of a rail toward the front of the machine, a front late fixed to said typewriter carri 'an extending in front of said frontrai, a totalizer includin a series of wheels, said totalizer su port? by said front plate, a master wheel or bearings between said front plate and said front rail, said separately-mountmeans; for effecting movement of said memher? to and from each other and thereby fine y adjusting said bearing surfaces relatively to each other to enable accurate meshing of the totalizer wheels'and master wheel throulghoutthe com uting zone.

4. n a combine typewritingand computing machine, the combination with a traveling carriage comprising a platen, and a rail on which said carriage travels near the rear thereof, of a rail toward the front .of the machine, a front plate extending downwardly in front of said front rail, bearings between said front plate and said frontrail, and forming the sole support for the front of said, carriage, said front rail comprising two separately-mounted "bearing surfaces, means for finely adjusting said bearing surfaces relatively to ea'ch other, brackets by which said front late is connected to the typewriter carnage and by which it supports said carriage,means for finely adjusting said plate on said brackets, a scale forming part of, said front plate and adjustable therewith, a master wheel in front of said plate, and a totalizer settable on said front plate according to said scale to cooperate with said master wheel.

5. In a-combined typewritin and computing machine, the combination with a totalizer, of a travelin carriage comprising a front plate adapted to support said totalizer, and having. oppositely facing V- grooves, a track comprising members having V-grooves facing the V-grooves in said plate and forming raceways therewith, bearing devices in said raceways, means for adjusting the ends of said members with respect to each other, means for fixedly securing said ends after such adjustment, and means including a plurality of screws at intermediate points to force said members apart or to draw them together, so that said members may be so adjusted as to insure accurate guiding of said totalizer in passing through a computing zone.

6. In a combined typewriting and computing machine, in combination, a totalizer,

a master wheel, a typewriter carriage comprising a totalizer-supporting plate through which said carriage is supported at its front, means, including a track, to guide said plate. said track comprising two rails, and means whereby said rails may be drawn together engage? or forced apart at a plurality of points therealong and flexed if desired, whereby accurate guiding of said totalizer in passing through a computing zone may be effected.

7. In a combined typewriting and computing machine, the combination with a traveling carriage, and a rail on which it travels, of a second rail, a totalizer mounted near said second rail but outside of both rails, a master wheel also outside of said rails, two facing V-grooves formed in said second rail, a plate having V-grooves facing said second rail and forming a mounting for the totalizer, means for adjusting the rail grooves relatively to each other, said means including a separate plate forming the rail for each groove, a plurality of screws for drawing said plates together, and a plurality of'screws for forcing said plates apart, said screws forming a plurality of groups, each comprising a separating screw and a drawing-together screw.

8. In a combined typewriting and computing machine, the combination with a traveling carriage, and a rail on which it travels, of a second rail, a totalizer mounted near said second rail but outside of both rails, a master wheel also outside of said rails, two facing ti-grooves formed in said second rail, a plate having V-grooves facing said second rail and forming a mounting for the totalizer, means for adjusting the rail grooves relatively to each other, said means including a separate plate forming the rail for each groove, a plurality of screws for drawing said plates together, and a plurality of screws for forcing said plates apart, said screws forming a plurality of groups, each comprising at least a separating screw and a drawing-together screw, the screws in each group being so distributed that they effect a symmetrical straining of the portions.

9. In a combined typewriting and computing machine including a carriage, the combination with a scale showing the position of the carriage, of a totalizer, including dial wheels and a master wheel, a scale for locating the totalizer on the carriage in ac cordance with the carriage scale, and a scale for indicating the totalizer wheel on which the master wheel is effective.

10. In a combined typewriting and computing machine, the combination with a carriage, of a scale for positioning said carriage, an adjustable totalizer-carrier forming part of said carriage, a scale thereon, and a totalizer adjustable on said carrier according to said carriage scale, at any position of adjustment of said carrier.

11. In a combined typewriting and computing machine, the combination with a traveling carriage comprising a platen, and a rail on which said carriage travels near the masses rear thereof, of a rail toward the front of the machine, a front late extending downwardly in front of sa1d front rail, bearings between said front plate and said front rail and forming the sole support for the front of said carriage, said front rail comprising two separately-mounted bearing surfaces, means for finely adjustin said bearing surfaces relatively-to each ot er, and means for independently holding said bearing surfaces in any one of several adjusted positions.

12. In a combined typewriting and computing machine, the combination with a traveling carriage comprising a platen and a rail on which said carriage travels near the rear thereof, of a rail toward the front of the machine, a front plate extending downwardly in front of said front rail, bearings between said front plate and said front rail and forming the sole support for the front of said carria c, said front railcomprising two separate y-mounted bearing surfaces, means for finely adjusting said bearing surfaces relatively to each other, means for independently holding said bearing surfaces in any one of several adjusted positions, brackets by which said front plate is connected to the typewriter carriage by which it supports said carriage, and means for finely adjusting said plate on said brackets.

13. In a combined typewriting and computing machine, in combination, a totalizer, a master wheel, a typewriter carriage comprising a totalizer-supporting plate through which said carriage is supported at its front, means, including a track, to guide said plate, said track comprising two rails, and means effective on said ralls at different points 'therealong, whereby said rails may be adjusted by flexing to insure accurate guiding of said totalizer in passing through a computing zone.

14:. In a combined typewriting and computing machine, the combination with a traveling carriage and a rail on which it travels, ofa second rail, a totalizer mounted near said second rail but outside of both rails, a master wheel also outside of said rails, two facing V-grooves formed in said second rail, a plate having V-grooves facing said second rail and forming a mounting for the totalizer, means for adjusting the rail grooves relatively to each other, means for separately holding said rail grooves independently at any one of several adjusted positions, said means for adjusting the rail grooves including a separate plate for each rail groove, a plurality of screws for drawing said plates together, and a plurality of screws for forcing said plates apart, said screws forming a plurality of groups, each comprising a separating screw and adrawing-together screw.

15. In acombined typewriting and com 'puting machine, the combination with a travellng carriage and a rail on which it travels, of a second-rail, a totalizer mounted near said second rail but outside of both rails, a master wheel also outside of said rails, two facing V-grooves formed in said second rail, a plate having V-grooves facing said second rail and formin a mounting for the totalizer, means for a justing the rail grooves relatively to each other, means for separately holding said rail grooves independently at any one of several adjusted positions, said means for adjusting the rail grooves including a separate plate for each rail groove, a plurality of screws for draw- 15 ing said plates together, and a plurality of screws vfor forcing said plates apart, each comprising at least a separating screw and a drawing-together screw, the screws in each group being so distributed that they effect 20 a symmetrical straining of the portions.

FREDERICK A. HART.

Witnesses:

EDITH B. LIBBEY, JENNIE P. THOBNE. 

